414 
BULLETIN OF THE BUREAU OF FISHERIES. 
at which, from an adequate examination of material, the disease is definitely known 
to exist or to have existed in an advanced stage as expressed by the exhibition of visible 
tumors. 
District of Columbia. 
Iowa: Manchester. 
Maine: Craig Brook, Auburn. 
Michigan: Paris; Northville. 
Missouri: Neosho. 
Montana: Bozeman. 
New Hampshire : Nashua. 
New York: Bath; Margarctville and 
hatcheries. 
NAMES OF 
Pennsylvania: Spruce Creek, Glen Eyre. 
South Dakota: Spearfish. 
Virginia: Wjdheville. 
Vermont: Roxbury; St. Johnsbury. 
Washington: North Yakima. 
West Virginia: White Sulphur Springs. 
other 
SPECIES AND HYBRIDS. 
While the disease primarily and chiefly is found in the brook trout, it has been 
observed among all the following species and hybrids in the United States. Two of 
these, the brown trout and Loch Leven trout, are introduced species, and one — the 
whitefish — belonging to a subfamily of the Salmonidae, is not the subject of fish culture 
as an adult and is represented by only one specimen bearing a tumor, this being a wild 
fish from a lake. It is quite certain that this list will be much extended as fast as other 
species of salmonoids are brought under domestication. The single species which, 
though bred artificially, can not yet be included among the species subject to thyroid 
carcinoma, is the sea trout (Salmo trutta Linnaeus), introduced into the United States 
as the Scotch sea trout. 
American brook trout; square-tail trout; redspot trout; 
speckled trout Salvelinus fontinalis (Mitchill). 
Rainbow trout Salmo irideus Gibbons. 
Landlocked salmon; Sebago salmon; Schoodic salmon Salmo sebago Girard. 
Loch Leven trout Salmo levensis Walker. 
Brown trout; von Behr trout Salmo fario Linnajus. 
Atlantic salmon Salmo salar Linnaeus. 
Great Lakes trout; lake trout; Mackinaw trout; namaycush 
trout; longe; lunge; togue; laker Cristivomer namaycush (Walbaum). 
Humpback salmon Oncorhynchus gorbuscha (Walbaum). 
Common whitefish Coregonus clupeiformis (Mitchill). 
Hybrid salmon : 
Female silver salmon 
Male humpback salmon . . 
Female silver salmon 
Male Chinook salmon 
Female blueback salmon. . 
Male humpback salmon . . . 
Female humpback salmon . 
Male blueback salmon 
Female brook trout 
Male landlocked salmon . . . 
Hybrid trout: 
American brook trout 
American saibling or sunapee trout 
.j- 
|Oncorh;>’nchus kisutch (Walbaum). 
lOncorhynchus gorbuscha (Walbaum). 
JOncorhynchus kisutch (Walbaum). 
’ (Oncorhynchus tschawytscha (Walbaum). 
[Oncorhynchus nerka (Walbaum). 
[Oncorhynchus gorbuscha (Walbaum). 
(Oncorhynchus gorbuscha (Walbaum). 
[Oncorhynchus nerka (Walbaum). 
[Salvelinus fontinalis. 
[Salmo sebago. 
{ Salvelinus fontinalis. 
Salvelinus aureolus (Bean). 
